Envelop



E. F. NISSEN.

ENVELOP- APPLICATION FILED MAR. 13. 1919.

Patented May 18, 1920.

INVENTOR flzyeizzmssezz ATTORNEYS UNITED STATES PATENT OFFICE.

EUGENEJF. NISSEN, 0F ALAMEDA, CALIFORNIA.

ENVELOP.

To all whom it may concern:

Be it known that I, EUGENE F. NissnN, a citizen of the United States, residing at Alameda, in the county of Alameda and State of California, have invented new and useful Improvements in Envelops, of which the following is a specification.

This invention relates to an envelop.

It is the principal object of this invention to provide an envelop possessing certain safety features which will prevent it from being tampered with without seriously mutilating the folds of the envelop and thus insuring detection.

The present mvention contemplates they use of an envelop blank formed of a single sheet of paper or other material, which blank is folded and gummed in a manner to cause an overlapping of the various panels to prevent access to the interior' of the envelop, the structure being further provided with mechanical fasteners which may be sealed and will practically preclude the possibility of obtaining access to the envelop without tearing it or breaking the seals.

The invention is illustrated by way of ex ample in the accompanying drawings, in which- Figure 1 is a view in plan showing the complete blank and indicating the gummed sections thereof.

Fig. 2 is a view similar to Fig. 1 showing the initial fold of the blank.

Fig. 3 is a view indicating the second step in the folding of the blank.

Fig. 4 is a view showing the blank with all of the side panels folded.

Fig. 5 is a view showing the blank completely folded to form the envelop.

Fig. 6 is a view indicating the position of the mechanical fasteners and their eyelets.

Fig. 7 is a complete view of the envelop as closed.

Fig. 8 is a view in elevation showing the envelop as closed and sealed.

Fig. 9 is a view in transverse section through the envelop blank as seen on the line 99 of Fig. 2.

Fig. 10 is a view in section through the blank as seen on the line 101O of Fig. 3.

Fig. 11 is a View in section showing the folded relation of the side panels as seen on the line 11-11 of Fig. 4.

Fig. 12 is a view in transverse section showing the folded relationship of the side Specification of Letters Patent.

Patented May 18, 1920.

Application filed March 13, 1919. Serial No; 282,278.

and back panel, as seen on the line 12.12 of Fig. 3.

Fig. 13 is a view in longitudinal section on the line 13-13 of Fig. 8 clearly disclos-.

ing the double front and back ture of the envelop.

Referringmore particularly to the drawings, 10 indicates a front or body panel of an envelop. This panel is bounded along its opposite sides by the score marks A and B and along its opposite ends by the score marks 0 and D. The score mark B separates the front panel from a short side flap 11, while the score mark A separates the front panel from a long side flap 12. The length of these flaps is equal to the length of the front panel, and, in the present instance, the width of the long flap is equal to the width of the front panel. The score mark C separates the front panel from a sealingflap 13, while the score mark D separates this panel from a back panel 14 agreeing in dimensions with the body panel. A secondary body panel 15 is formed as a, continuation of the side panel 12 and is separated from the back panel 14 throughout its length.

Referring particularly to Fig. 2, it will be noted that the sealing flap 13 is gummed at 16, that the short side flap 11 is gummed at 17 and that the back panel 14 is gummed along its opposite sides, as indicated at 18 and 19. The secondary panel 15 is gummed on its back side, as indicated at 20 and 21 in Fig. 2. The completely formed envelop is provided with mechanical fasteners 22 which extend through the side flaps 11 and 12 and the back panel '14. These fasteners are intended to register with eyelets 23 formed in the closing flap 13 of the envelop and thereafter covered by seals 24.

In forming the envelop the blank is made, as shown in Fig. 1, and gummed as indicated in Figs. 1 and 2. The secondary body panel is then folded upwardly along the score mark D and will thus completely conceal the long side flap 12, assuming the position shown in Fig. 2. The secondary body panel 15 and the side panel are then folded over upon the body panel 10, as shown in Fig. 3. The mmed portions 20 and 21 of the secondary body panel are fastened to the registering faces of the main panel 10, and the secondary flap thus forming a double front for the envelop, as shown in Fig. 10. The short side flap 11 is next folded over the flap l2 and fastened along the gummed margin 17 These side panels are then completely covered by the back panel 16': which is gummed and secured along the portions 18 and 19. The envelop is then completed by placing the fasteners 22 in position and stapling them through the back panel and the two side flaps at the point indicated in Fig. 6. When the envelop is so formed the fastener members are brought to register with the eyelets 23 and after having been bent over are covered by the seals 24. This will insure that one end of the envelop is entirely secured and that the sealing flap 13 will be held down by mechanical fasteners as well as the seals.

If an attempt is made to gain access to the contents of the envelop it is possible to steam all of the gummed portions and completely separate the various flaps except as they are secured by the fasteners 22 and the seals. The natural procedure would be to separate the short and long side flaps 11 and 12 and to thereafter endeavor to withdraw the contents of the envelop from around the edge of the side flap 12 as it lies along the score mark B. This edge is securely held in place, however, by the secondary body panel 15 which is gummed to the front panel,-thus making it impossible to either reach the contents of the envelop or withdraw the same.

While I have shown the preferred form of my invention as now known to me, I

wish it understood that various changes in the construction, combination and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

An envelop composed of a front panel, opposite side flaps borne thereby, a sealing flap anda back panel borne by the opposite ends of the front panel, and a secondary body panel connected to and extending outwardly from an end of one of the side fiaps, the secondary body panel being folded upwardly and superimposed upon said side flap to which it is connected, the back of said secondary side panel having gummed parts which are secured to the front panel and the other side flap being gummed onto the side flap carrying said secondary side panel, the back panel being superimposed and gummed to the said other side flap and to the secondary side panel and the sealing flap being gummed onto the back panel.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EUGENE F. NISSEN. Witnesses W. W. HEALEY, M. E. EWING. 

